USB2504/USB2504A
Integrated USB2.0
Compatible 4-Port Hub
PRODUCT FEATURES
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Data Brief
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Integrated USB2.0 Compatible 4-Port Hub
— 4 Transaction Translators for highest performance
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
Low-Speed (1.5Mbits/s) compatible
— Full power management with per port or ganged
,
selectable power control
— Detects Bus-Power/Self-Power source and changes
mode automatically
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Complete USB Specification 2.0 Compatibility
— Includes USB2.0 Transceivers
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VID/PID/DID, and Port Configuration for Hub via:
— Single Serial I
2
C EEPROM
— SMBus Slave Port
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Default VID/PID/DID, allows functionality when
configuration EEPROM is absent
Hardware Strapping options allow for configuration
without an external EEPROM or SMBus Host
On-Board 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
Internal PLL for 480MHz USB2.0 Sampling
Internal 1.8V Linear Voltage Regulator
Integrated USB termination and Pull-up/Pull-down
resistors
Internal Short Circuit protection of USB differential
signal pins
1.8 Volt Low Power Core Operation
3.3 Volt I/O with 5V Input Tolerance
64-Pin TQFP or 56 Pin QFN Package; green, lead-
free package also available
SMSC USB2504/USB2504A
PRODUCT PREVIEW
Revision 1.8 (11-11-05)
Integrated USB2.0 Compatible 4-Port Hub
ORDER NUMBER(S):
USB2504/USB2504A-JD FOR 64 PIN TQFP PACKAGE, USB2504/USB2504A-ABZJ FOR 56 PIN QFN PACKAGE AND
USB2504/USB2504A-JT FOR 64 PIN TQFP PACKAGE (GREEN, LEAD-FREE)
80 Arkay Drive
Hauppauge, NY 11788
(631) 435-6000
FAX (631) 273-3123
Copyright © 2005 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently,
complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be
accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any
time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this
information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual
property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated
version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may
contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly
sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other
application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written
approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other
SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com. SMSC is a
registered trademark of Standard Microsystems Corporation (“SMSC”). Product names and company names are the trademarks of their respective
holders.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT AND THE LIKE,
AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE. IN NO EVENT SHALL SMSC BE
LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES; OR FOR LOST DATA,
PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT;
NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY
OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
Revision 1.8 (11-11-05)
PRODUCT PREVIEW
2
SMSC USB2504/USB2504A
Integrated USB2.0 Compatible 4-Port Hub
General Description
The SMSC 4-Port Hub is fully compliant with the USB2.0 Specification and will attach to a USB host
as a Full-Speed Hub or as a Full-/High-Speed Hub. The 4-Port Hub supports Low-Speed, Full-Speed,
and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled
downstream ports.
A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture
ensures maximum USB throughput for each connected device when operating with mixed-speed
peripherals.
The Hub works with an external USB power distribution switch device to control V
BUS
switching to
downstream ports, and to limit current and sense over-current conditions.
All required resistors on the USB ports are integrated into the Hub. This includes all series termination
resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The
over-current sense inputs for the downstream facing ports have internal pull-up resistors.
Throughout this document the upstream facing port of the hub will be referred to as the upstream port,
and the downstream facing ports will be called the downstream ports.
OEM Selectable Features
A default configuration is available in the USB2504/USB2504A following a reset. This configuration
may be sufficient for some applications. Strapping option pins make it possible to modify a limited sub-
set of the configuration options.
The USB2504/USB2504A may also be configured by an external EEPROM or a microcontroller. When
using the microcontroller interface, the Hub appears as an SMBus slave device. If the Hub is pin-
strapped for external EEPROM configuration but no external EEPROM is present, then a value of ‘0’
will be written to all configuration data bit fields (the hub will attach to the host with all ‘0’ values).
The 4-Port Hub supports several OEM selectable features:
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Operation as a Self-Powered USB Hub or as a Bus-Powered USB Hub.
Operation as a Dynamic-Powered Hub (Hub operates as a Bus-Powered device if a local power
source is not available and switches to Self-Powered operation when a local power source is
available).
Multiple Transaction Translator (Multi-TT) or Single-TT support.
Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from
an external SMBus Host.
Port power switching on an individual or ganged basis.
Port over-current monitoring on an individual or ganged basis.
LED indicator support.
Compound device support (port is permanently hardwired to a downstream USB peripheral device).
Hardware strapping options enable configuration of the following features.
Non-Removable Ports
Port Power Polarity (active high or active low logic)
Port Disable
LED support
MTT enable
Ganged Vs Port power switching and over-current sensing
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SMSC USB2504/USB2504A
PRODUCT PREVIEW
3
Revision 1.8 (11-11-05)
Integrated USB2.0 Compatible 4-Port Hub
Block Diagram
Upstream Upstream 24 MHz
USB Data
V
BUS
Crystal
3.3V
To
EEPROM
Pin
1.8V Strapping or SMBus
Master
Cap Options
SD SCL
Upstream
PHY
V
BUS
Power
Detect
PLL
1.8V
Reg.
Internal
Defaults
Select
Serial
Interface
Repeater
SIE
Controller
TT
#1
TT
#2
TT
#3
TT
#4
Port
Controller
Routing Logic
Port #1
OC Sense
Downstream
Switch Driver
PHY #1
LED Drivers
...
Port #4
OC Sense
Downstream
Switch Driver
PHY #4
LED Drivers
Downstream OC Switch/LED
USB Data Sense Drivers
Downstream
OC Switch/LED
USB Data
Sense Drivers
Figure 1 4-Port Block Diagram
Revision 1.8 (11-11-05)
PRODUCT PREVIEW
4
SMSC USB2504/USB2504A
Integrated USB2.0 Compatible 4-Port Hub
Package Outlines
Figure 2 64 Pin TQFP Package Outline (10x10x1.4 mm body - 2 mm footprint)
Table 1 64 Pin TQFP Package Parameters
MIN
A
A1
A2
D
D1
E
E1
H
L
L1
e
q
W
R1
R2
ccc
~
0.05
1.35
11.80
9.80
11.80
9.80
0.09
0.45
~
0
o
0.17
0.08
0.08
~
NOMINAL
~
~
~
~
~
~
~
~
0.60
1.00
0.50 Basic
~
0.22
~
~
~
MAX
1.60
0.15
1.45
12.20
10.20
12.20
10.20
0.20
0.75
~
7
o
0.27
~
0.20
0.08
REMARKS
Overall Package Height
Standoff
Body Thickness
X Span
X body Size
Y Span
Y body Size
Lead Frame Thickness
Lead Foot Length
Lead Length
Lead Pitch
Lead Foot Angle
Lead Width
Lead Shoulder Radius
Lead Foot Radius
Coplanarity
Notes:
1. Controlling Unit: millimeter.
2. Tolerance on the true position of the leads is ± 0.04 mm maximum.
3. Package body dimensions D1 and E1 do not include the mold protrusion.
Maximum mold protrusion is 0.25 mm per side.
4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.
5. Details of pin 1 identifier are optional but must be located within the zone indicated.
SMSC USB2504/USB2504A
PRODUCT PREVIEW
5
Revision 1.8 (11-11-05)
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